Airworthiness Directive · Amendment 39-19721 · Fuselage
Learjet, Inc. Airplanes
This AD applies to Learjet, Inc., Model 60 airplanes, certificated in any category, having serial numbers 60-002 through 60-430 inclusive, and having a configuration identified in paragraph (c)(1) or (2) of this AD.
(1) Airplanes with a dorsal-mounted oxygen bottle.
(2) Airplanes that have had the dorsal mounted oxygen bottle removed but have retained the oxygen line fairing installed on top of the fuselage.
The FAA is superseding Airworthiness Directive (AD) 2017-11-09 for certain Learjet, Inc. (Learjet), Model 60 airplanes. AD 2017-11-09 required a one-time fluorescent dye penetrant inspection of the fuselage skin for corrosion, additional related inspections and corrective actions as necessary, and reporting the inspection results to the FAA. This AD clarifies the compliance time for the inspection and corrects an error in the inspection area of the fuselage skin. This AD was prompted by the identification of an error in the fluorescent dye penetrant inspection of the fuselage skin and an ambiguity in the compliance time for the fluorescent dye penetrant inspection. The FAA is issuing this AD to address the unsafe condition on these products.
At the applicable compliance times specified in paragraphs (g)(1) through (3) of this AD, do the fluorescent dye penetrant inspection of the fuselage skin for corrosion. Before further flight, do all related investigative and corrective actions. Follow the Accomplishment Instructions of Bombardier Learjet 60 Service Bulletin 60-53-19, Revision 3, dated August 29, 2016, (SB 60-53-19, Revision 3) except as required by paragraph (h) of this AD.
(1) As of May 22, 2017 (the effective date of AD 2017-08-07, Amendment 39-18856 (82 FR 18084, April 17, 2017) (“2017-08-07”), which was superseded by AD 2017-11-09), any airplanes with more than 12 years since the date of issuance of the original airworthiness certificate or the date of issuance of the original export certificate of airworthiness, whichever date is earlier: Inspect within 12 months after May 22, 2017 (the effective date of AD 2017-08-07, which was superseded by 2017-11-09).
(2) As of May 22, 2017 (the effective date of AD 2017-08-07, which was superseded by AD 2017-11-09), any airplanes with more than 6 years but equal to or less than 12 years since the date of issuance of the original airworthiness certificate or the date of issuance of the original export certificate of airworthiness, whichever date is earlier: Inspect within 24 months after May 22, 2017 (the effective date of AD 2017-08-07, which was superseded by AD 2017-11-09).
(3) As of May 22, 2017 (the effective date of AD 2017-08-07, which was superseded by AD 2017-11-09), any airplanes with 6 years or less since the date of issuance of the original airworthiness certificate or the date of issuance of the original export certificate of airworthiness, whichever date is earlier: Inspect within 36 months after May 22, 2017 (the effective date of AD 2017-08-07, which was superseded by AD 2017-11-09).
This paragraph restates the requirements of paragraph (h) of AD 2017-11-09, with no changes. Where SB 60-53-19, Revision 3, specifies contacting Learjet, Inc., for appropriate action: Before further flight, repair using a method approved in accordance with the procedures specified in paragraph (l) of this AD.
This paragraph restates the requirements of paragraph (i) of AD 2017-11-09, with no changes. At the applicable time specified in paragraph (i)(1) or (i)(2) of this AD: Submit a report of the findings (both positive and negative) of the inspection required by the introductory text of paragraph (g) of this AD to: Wichita-COS@faa.gov; or Ann Johnson, Wichita ACO Branch, 1801 Airport Road, Wichita, KS 67209. The report must include the name of the owner, the address of the owner, the name of the organization incorporating Learjet 60 Service Bulletin 60-53-19, the date that inspection was completed, the name of the person submitting the report, the address, telephone number, and email of the person submitting the report, the airplane serial number, the total time (flight hours) on the airplane, the total number of landings on the airplane, whether corrosion was detected, whether corrosion was repaired, the structural repair manual (SRM) chapter and revision used (if repaired), and whether corrosion exceeded the minimum thickness specified in Bombardier Learjet 60 SB 60-53-19 (and specify the SRM chapter and revision, if used as an aid to determine minimum thickness).
(1) If the inspection was done on or after May 22, 2017 (the effective date of AD 2017-08-07, which was superseded by AD 2017-11-09): Submit the report within 30 days after the inspection.
(2) If the inspection was done before May 22, 2017 (the effective date of AD 2017-08-07, which was superseded by AD 2017-11-09): Submit the report within 30 days after May 22, 2017 (the effective date of AD 2017-08-07, which was superseded by AD 2017-11-09).
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
